Lamp-chimney.



G. W. LINDSEY.

LAMP CHIMNEY.

- APPLICATION FILED Nov. 30. I9I5.

Patented May16, 1916.

\AI 1% I WITNESSES.

THE COLUMBIA PMNOGRAPH 00., WASHINGTON, D. c.

UNITE STATEFa cream GEORGE WINSTON LINDSEY, CF EERBYS, VIRGINIA, ASEZIGNGR OF ONE-THIRD T0 MRSHALL CLEVELAND WILEY, OF BERRYS, VIRGINIA.

LAMP-CHIMNEY.

Specification of Letters Patent.

Patented May 16, 1%16.

Appfioation filed November 30, 1915. Serial No. 64,281.

To all whom it may concern Be it knownthat I, Gnonen Wms'roN LINDSEY, a citizen of the United States, and a resident of Berrys, in the county of Clarke and State of Virginia, have invented a new and useful Improvement in Lamp-Chimneys, of which the following is a specification.

My invention is an improvement in lamp chimneys, and the invention has for its object to provide mechanism for use in connection with lamp chimneys of any charac ter, for permitting the rays emitted at the base of the chimney to be utilized by refleetingthe said rays and concentrating them with the rays given out above and at the flame, wherein the said means may be an integral part of the chimney or a separate article of manufacture permanently or temporarily attached to the chimney.

In the drawings :-Figure 1 is a vertical section through a chimney provided with the improvement, Fig. 2' is a perspective view of the improvement detached, and Fig. 3 is a partial sectional view similar to Fig. 1, showing a modified arrangement.

The embodiment of the invention shown in Fig. 1 is shown in connection with the chimney 1 of a lamp 2, the chimney being of ordinary construction and having the reduced cylindrical portion 3 at its lower end for fitting within the uprights or brackets 4. of the holder 5 for the chimney.

As is known, four of the holding brackets 4c are used, the said brackets engaging the cylindrical portion 3 of the chimney at angular intervals of 90, and the said holding brackets are at the outer face of the chimney. The flame of the lamp is at the cylindrical portion of the chimney, and the rays of light emitted at this point and which pass directly out through the transparent chimney are, as a rule, wasted because they are emitted at such a point that they may not be used to advantage. In order to refiect these rays to points where they will be of benefit and will assist the illuminating power of the lamp a mirror is provided in connection with the chimney for reflecting and concentrating the rays. As shown in Fig. 1 this mirror surface 7 may be on a separate sleeve or collar 8, and while the said surface may be on either the outer or the inner surface of the sleeve or collar, it is preferably on the outer surface and adjacent to the inner surface of the cylindrical portion of the chimney. Themirror surface is of ordinary construction applied in the usual ordmary manner and it is arranged to refiect inwardly. This sleeve or collar is of a diameter such that it will fit snugly within the cylindrical portion 3 of the chimney and the sleeve or collar may be of a length or depth to extend from the supporting bracket 5 of the lamp to that point where the cylindrical portion begins to merge into the bulge or enlargement of the chimney. The sleeve or collar should not extend sufficiently high to out off the reflected rays otherwise the object ofthe mirror surface is defeated. In practice the collar will extend to a point such that it will reflect a maximum while cutting ofi a minimum of rays.

In Fig. 3 a modified construction is shown, wherein the cylindrical portion 9 of the chimney 10 has the mirror surface inclicated at 11, arranged on the chimney and in the present instance on the outer surface thereof although it is obvious that the mirror surface might be on the inner surface of the cylindrical portion 9. The arrangement of the mirror surface in both Figs. 1 and 3 is for a definite purpose. In Fig. 1 the collar or sleeve 8 having the mirror surface be tween the said collar and the cylindrical portion of the chimney protects the said surface from injury, since in cleaning the chimney the person cleaning cannot touch the mirror surface or coating.

The chimney may be cleaned, that is, wiped out in the usual manner without any risk of touching the mirror surface or coating. In Fig. 3, the mirror surface is on the outside, so that in cleaning the interior of the chimney the said surface or coating 11 is not touched.

lVhile it is true that the surface is liable to injury from the supporting brackets 12 yet this risk is slight as compared with the risk of injury from cleaning the chimney. In addition by arranging the surface on the outer face of the chimney it is less liable to be affected by changes in temperature due to the flame of the lamp. This applies in the same manner to Fig. 1 where the coating or mirror surface is on the outer surface of the sleeve or collar.

In use, the light rays emanating downward striking the barrier and the body of the lamp are lost with the usual construction sleeve or collar.

of chimney. With the present construction however, these rays as well as those passing directly outward strike the mirror surface and are reflected upward and outward, thus being delivered at a point where they can be utilized. In either form the'action is precisely the same and it will be obvious that the collar must not extend to a height such that these rays will be cut off.

The improvement while simple is yet very efficient, increasing the illuminating power of the lamp to a very great extent for a large amount of the light rays emanating from the flame are thus combined, reflected and concentrated at the point where they will do the most good. The improvement does not. add greatly to the cost of the chimney, since it is merely a sleeve or collar of glass suitably coated. In Fig. 3 where the coating is applied directly to the chimney the cost is yet further lowered. The sleeve when used may be of any suitable transparent material, as for instance, glass, isinglass or the like, or the sleeve may be of metal or other opaque material in which case it will be evident that the mirror coating must be on the inner surface of the 2. In combination with a lamp chimney,

of a sleeve or collar fitting within the cylindrical portion thereof and, having a mirror surface or reflecting surfaceon its outer face between the same and the interior of the chimney. V

' 3. As a new article of manufacture, a

sleeve or collar adapted to be applied to the lower end of a lamp chimney, and comprising a continuous band of transparent ma terial having a continuous reflecting surface applied to its outer surface.

4. As a new article of manufacture, a

sleeve or collar adapted to be appliedto. the

lower end of a lamp chimney, and COIISlSt? ing of a continuous band of transparent material and a continuous band of reflecting material surrounding the outer surface of said transparent hand GEORGE WINSTON LINDSEY.

copies of this patent may be obtained for five cents each, by addressing the Commissioner of Iatents.

Washington, I). G. i 

